The original laser beam will be very large (~1 km in diameter). Initially neglecting spreading of the beam
(valid when a nanocraft is close to earth), estimate the acceleration that the nanocraft will feel, assuming
the total laser power over the entire 1-km diameter is a sustained 100 GigaWatts (1 GigaWatt = 10
9 W). Don't
forget to account for the finite size of the sail, or the fact that it is 100% reflective.
a. 330,000 m/s^2
b. 10.7 m/s^2
c. 3.2 m/s^2
d. 0.23 m/s^2
e. 670,000 m/s^2

The two required components for a generator

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0